Im not a full auto type of guy, even with an m4 id be in single shot almost the whole time. I dont care if its heavy, I marched around with a garand in basic no problem. 556 may do good against most targets, but it doesn't deliver much energy at longer ranges, is poor at punching through cover,while a 308 would pierce that wall the enemie's behind with stopping power to spare, 556 is not not the greatest on body armor, vehicles, etc, and poor against drugged up enemies like we were seeing in somalia. And with an m1a, i could put a 4 round mag in and have an nice deer rifle
